Putting 4 leds in casing?
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Where do i connect those
i want them to connect directly to the PSU
do i need a resistance?...
let me know
thanks!
^^
i want them to connect directly to the PSU
do i need a resistance?...
let me know
thanks!
^^
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- Joined:Sat Mar 31, 2007 11:47 am
If the LEDs are 5v, connect them to the 7805A regulator.
Looking at the NES board with the big metal box at the backright, the right pin is +5v, and the middle is ground. Oh, and the regulator has 3 pins - And is on the front of the metal box
Though don't wire the LEDs wrong unless you're a pyromaniac who doesn't mind possibly wrecking a NES or some LEDs, 'cause it could kill your NES.
And you might need a resistance, though you may not, I dunno - Not got that far in tech studies yet
EDIT:Put wrong part number for regulator
Looking at the NES board with the big metal box at the backright, the right pin is +5v, and the middle is ground. Oh, and the regulator has 3 pins - And is on the front of the metal box
Though don't wire the LEDs wrong unless you're a pyromaniac who doesn't mind possibly wrecking a NES or some LEDs, 'cause it could kill your NES.
And you might need a resistance, though you may not, I dunno - Not got that far in tech studies yet
EDIT:Put wrong part number for regulator
- johnbjuice
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Oh yeah, I remember... Do you know the mA values of the LEDs?
If you do, let me know. I just remembered the stuff from Tech studies - which to tell you is a lot of crap here, I learnt more from ben's book!
But anyways, I remembered how to work out what resistance you need... I think. Enough resistance to drop the mA for each LED to the mA values, yet not so much that the LEDs are dark. Though I'm not sure if it'll work, but it's a good idea to ask someone who knows more to see if they agree with the value I'll work out
If you do, let me know. I just remembered the stuff from Tech studies - which to tell you is a lot of crap here, I learnt more from ben's book!
But anyways, I remembered how to work out what resistance you need... I think. Enough resistance to drop the mA for each LED to the mA values, yet not so much that the LEDs are dark. Though I'm not sure if it'll work, but it's a good idea to ask someone who knows more to see if they agree with the value I'll work out
Lorelis-san wrote:Oh yeah, I remember... Do you know the mA values of the LEDs?
If you do, let me know. I just remembered the stuff from Tech studies - which to tell you is a lot of crap here, I learnt more from ben's book!
But anyways, I remembered how to work out what resistance you need... I think. Enough resistance to drop the mA for each LED to the mA values, yet not so much that the LEDs are dark. Though I'm not sure if it'll work, but it's a good idea to ask someone who knows more to see if they agree with the value I'll work out
No, it's drop the voltage, not the mA. Most LED use around 20 mA and between 1.8V to 3.6V (red to blue). Anyway, so let's says I have a 5 Volt source. I can put 2x LED in series or if I want to be safer, I can put 1 LED and a resistance. So Let's says I have a 2V led and a 5V output. I want the resistance to «eat» the 3V that won't be use by the LED. So I have mA rating of the LED (20mA). We have V=RI -> 3V=R*20mA
3V/(20*10^-3A) so I get 150 Ohms. You need to get a resistance near that value.
Jeep
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Posted it before as seen up aboveLorelis-san wrote:...connect them to the 7805A regulator.
Looking at the NES board with the big metal box at the backright, the right pin is +5v, and the middle is ground. Oh, and the regulator has 3 pins - And is on the front of the metal box
Though don't wire the LEDs wrong unless you're a pyromaniac who doesn't mind possibly wrecking a NES or some LEDs, 'cause it could kill your NES...
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No, that's not the regulator - you removed it with the big metal box
Lemme go look in ben's book to find the spot you'd get it from
Found it - middle spot of the 5 connections you desoldered to get the huge silver chunky box off - which means if on your pic you number all the big solder points in the upper left 1 to 6, left being one, connection 4 is where you put 5v in the NES to run it, thus LEDs are perfect to be connected there
Lemme go look in ben's book to find the spot you'd get it from
Found it - middle spot of the 5 connections you desoldered to get the huge silver chunky box off - which means if on your pic you number all the big solder points in the upper left 1 to 6, left being one, connection 4 is where you put 5v in the NES to run it, thus LEDs are perfect to be connected there
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